Sato Hub
x402

What does an x402 call actually cost?

What x402 endpoints declare they charge per call, by price.

All numbers
  • As of2026-10-26

Declared, not charged

Every figure below is read out of the HTTP 402 payload the endpoint itself serves — what the seller says the next call will cost. Nobody paid it. The field is maxAmountRequired, a ceiling rather than a price, so the settled amount can be less. None of this is evidence that paying works, that the seller delivers, or that these are prices anyone has been charged.

CapabilityNetworkMedian / callRangeSellersQuotable?
price-feedeip155:84530.002 USDC—1below the floor
onchain-dataeip155:84530.021 USDC0.002–0.042below the floor
swap-quoteeip155:84530.0012 USDC—1below the floor
inferenceeip155:84530.002 USDC—1below the floor
searcheip155:84530.04 USDC—1below the floor
othereip155:84530.05 USDC0.005–56below the floor

Every bucket above sits below the 20-seller floor this site publishes a statistic on. The readings are real and are shown with their counts; none of them is presented as what x402 costs, and a handful of sellers is never multiplied into a market.

Coverage
12 of 10 declared endpoints read named a readable USDC price on a mainnet network.
Excluded
Nothing on the latest run. A price in an asset we cannot identify as USDC, or declared on a testnet, is left out and counted rather than converted or compared.
Capability
A capability is Sato Hub's reading of the listing's own category and tags and of the path the seller published. It describes what is offered, never that it works, is safe, or delivers. No payment was made to find out. An endpoint matching two rules appears under both.
Method
The `maxAmountRequired` (or `amount`/`price`) field of the first payment term in the HTTP 402 payload the endpoint itself served, with the `asset` and `network` it declared beside it. Read in the asset's own base units per the x402 spec (a value containing a decimal point is read as whole units instead). No payment was sent, so no price here was ever charged or settled.
Related
Whether these endpoints answer at all is on x402 endpoints that answer, and the per-endpoint table on x402 verified.

Data CC-BY-4.0 — attribution: data by satohub.ai. Declared prices only; no payment has been sent, and unknown is a value here rather than a zero.

Reference

QuestionsShowHide

Questions this page answers

What does an x402 call cost?
Median declared price per call (read 2026-10-26): price-feed on eip155:8453: 0.002 USDC across 1 seller; onchain-data on eip155:8453: 0.021 USDC across 2 sellers (0.002–0.04); swap-quote on eip155:8453: 0.0012 USDC across 1 seller; inference on eip155:8453: 0.002 USDC across 1 seller; search on eip155:8453: 0.04 USDC across 1 seller; other on eip155:8453: 0.05 USDC across 6 sellers (0.005–5). Each is the median across the sellers in that bucket on that settlement network — never across networks, and never across assets.
Has anyone actually paid these prices?
No, and the page would be dishonest if it implied otherwise. Every figure is read out of the HTTP 402 payload the endpoint itself serves — what the seller says the next call costs. No payment is ever sent, so nothing here shows that paying works, that the seller delivers, or that the price is what anyone is charged.
Is the declared price the price?
It is a ceiling. The field is maxAmountRequired: the most the seller will take for that call. The settled amount can be less, and nothing on this page observes a settlement.
Why are some prices missing from the index?
Nothing was excluded on the latest run. Where a price is denominated in an asset we cannot identify as USDC, or declared on a testnet, it is left out and counted rather than converted or compared.
How is a capability decided?
From the path the seller published and the listing's own category and tags — price-feed, onchain-data, swap-quote, inference, storage, search, identity, or "other" when nothing matched. "Other" is a real answer, not a guess. An endpoint that matches two rules is counted under both, because it sells both.
Which of these medians can be quoted as a finding?
None of them yet. Every bucket is below the 20-seller floor this site publishes a statistic on, so the readings are listed with their counts and no median is presented as the price of anything.
SourcesShowHide

Sources — the payment protocol these prices are declared under

Cite this pageShowHide

Cite this

Sato Hub read x402 prices from 12 endpoints, but too few sellers offer any one service to publish a typical price yet, as of 2026-10-26.

Sato Hub, "What does an x402 call actually cost?", https://satohub.ai/numbers/x402-price-per-call, as of 2026-10-26. Data CC-BY.

How this was measured

Method
The median of the price each seller declares (`maxAmountRequired`) in the HTTP 402 payload its own endpoint served, per capability and network, in USDC on mainnets only; no payment is sent, so it is a declared ceiling, not a charge.
Window
The latest weekly reading.
Data date
MCP call
onchain_agent_get_agent_economy({"venue":"x402"}) on https://satohub.ai/api/mcp
URL
https://satohub.ai/api/export/adoption.json?venue=x402

The medians are the rows whose stage starts with price_median_usdc:, one per capability and network.

Machine source